<template>
    <fieldset>
        <legend>tab切换案例</legend>
        <button v-for="btn in button" :key="btn" :class="['tab-button',{active: btn === selectBtn}]" @click="handleClick(btn)">{{btn}}</button>
 
        <div class="tab" :is="dynamic">123433</div>

    </fieldset>
</template>

<script>
    import emailCom from "./email.vue"
    import homeCom from "./home.vue"
    import mineCom from "./mine.vue"

    export default{
        components:{
            'email-com':emailCom,
            'home-com':homeCom,
            'mine-com':mineCom
        },
        data(){
            return{
                button:['email','home','mine'],
                selectBtn:"email" //初始值
            }
        },
        methods:{
            handleClick(btn){
                this.selectBtn = btn;
            }
        },
        computed:{
            dynamic(){
                return this.selectBtn + '-com'
            }
        }
    }
</script>

<style scoped>
    .tab-button {
        padding: 6px 10px;
        border-top-left-radius: 3px;
        border-top-right-radius: 3px;
        border: 1px solid #ccc;
        cursor: pointer;
        background: #f0f0f0;
        margin-bottom: -1px;
        margin-right: -1px;
    }

    .tab-button:hover {
        background: #e0e0e0;
    }

    .tab-button.active {
        background: hotpink;
    }

    .tab {
        border: 1px solid #ccc;
        padding: 10px;
    }
    h1 {
        margin:0;
    }
</style>